Valves and valve actuation – Fluid actuated or retarded – Flexible wall expansible chamber reciprocating valve actuator
Patent
1996-11-20
1998-06-23
Lee, Kevin
Valves and valve actuation
Fluid actuated or retarded
Flexible wall expansible chamber reciprocating valve actuator
251 611, F16K 31126
Patent
active
057693870
ABSTRACT:
A flow valve operated by a flow transfer controller which regulates a small flow of control in order to produce a pressure differential between the sides of a sealing wall of a piston able to axially move between an open position far from the valve seat and a closed position in contact with the valve seat. The valve of the invention basically consists of a rigid valve body with an opening for a flow inlet and flow outlet. The body of the valve has a main cavity between the inlet and outlet of flow with the valve seat. The valve body comprises an elastomeric body located inside the main cavity to regulate the flow of fluid through the valve. The elastomeric body is hollow and open at an upper end and has a first sealing zone an a lower base of the elastomeric body. Control flow inlet and outlet ducts communicate with the hollow upper portion of the elastomeric body to actuate the valve.
REFERENCES:
patent: 3493008 (1970-02-01), Scaglione
patent: 3689025 (1972-09-01), Kiser
patent: 4221361 (1980-09-01), Weingarten
patent: 4872639 (1989-10-01), Gemignani
patent: 5383646 (1995-01-01), Weingarten
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